Woodworking vise for school teaching materials (understand type)

[Features]
· A tool type that can be mounted on the top surface of a workbench.
· The main body and movable parts are made of robust hard cast iron FC250.
· Trapezoidal screws are used for powerful tightening.
· Stopper balls are integrated casting, so they will not come off.
· All parts are interchangeable and replaceable.